I'm not sure a backdoor in all cryptography products is a solution to anything, except making the security of law-abiding citizens less secure.
If you're already a criminal, using a cryptography product without a backdoor, or simply creating such a product yourself, wouldn't be much of a hurdle.
I'm not sure we can count on the stupidity of the criminals to go out and buy PGP 2002 XP with a known government backdoor.
I'm not sure a backdoor in all cryptography products is a solution to anything, except making the security of law-abiding citizens less secure.
If you're already a criminal, using a cryptography product without a backdoor, or simply creating such a product yourself, wouldn't be much of a hurdle.
I'm not sure we can count on the stupidity of the criminals to go out and buy PGP 2002 XP with a known government backdoor.